Catalytic asymmetric [3 + 2] cycloaddition of pyrazolone-derived MBH carbonate: highly stereoselective construction of the bispiro-[pyrazolone-dihydropyrrole-oxindole] skeleton

Chem Commun (Camb). 2022 Apr 28;58(35):5363-5366. doi: 10.1039/d2cc00618a.

Abstract

A catalytic asymmetric construction of the bispiro[pyrazolone-dihydropyrrole-oxindole] skeleton catalyzed by chiral DMAP-derived catalyst was successfully achieved by employing recently explored pyrazolone-derived MBH carbonate in high yields with excellent stereoselectivities. The proposed transition state indicated that the intermolecular hydrogen bonds and π-π interactive forces played an essential role in stereoselective chemical transformation.

MeSH terms

  • Carbonates
  • Catalysis
  • Cycloaddition Reaction
  • Molecular Structure
  • Oxindoles
  • Pyrazolones*
  • Pyrroles
  • Skeleton
  • Stereoisomerism

Substances

  • Carbonates
  • Oxindoles
  • Pyrazolones
  • Pyrroles
  • pyrroline